Equivalent & Substitute Parts for 40FR50E

Part Overview

The 40FR50E is a 500 mOhms ±1% 10W through-hole resistor manufactured by Ohmite in the Ohmicone® 40 series. This axial wirewound resistor is designed for applications requiring low-resistance, high-power dissipation in a compact form factor. The part is currently active and available in boxed packaging with RoHS compliance certification. Substitute parts are identified when equivalent electrical and mechanical parameters are required due to inventory constraints, packaging preferences, or specific application requirements.

Substiute Parts

40FR50E

OhmiteIn Stock: 104540FR50E Datasheet

Current PartRFQ

40FR50

OhmiteIn Stock: 85940FR50 Datasheet

Parametric EquivalentRFQ

RS010R5000FE73

Vishay DaleIn Stock: 8471RS010R5000FE73 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 40FR50E are identified based on matching the following critical parameters: resistance value (500 mOhms), tolerance (±1%), power rating (10W), composition (wirewound), package type (axial), and temperature coefficient (±90ppm/°C). These parameters define the functional equivalence of the component within its application context.

Two substitute parts are identified:

Parametric Equivalent (40FR50): Identical electrical specifications and physical dimensions to the main part, differing only in packaging format (bulk versus box) and RoHS compliance status.

Similar Equivalent (RS010R5000FE73): Matches all critical electrical parameters and axial package type. Physical dimensions vary slightly (0.375" Dia x 1.780" L versus 0.406" Dia x 1.902" L), and operating temperature range differs (-65°C ~ 250°C versus -55°C ~ 275°C). Includes moisture-resistant feature and ROHS3 compliance.

Parameter Comparison

Engineering Selection Recommendations

40FR50 (Parametric Equivalent): This part is electrically and mechanically identical to the 40FR50E with matching dimensions and specifications. Selection of this part is appropriate when bulk packaging is acceptable. Note that this part carries RoHS non-compliant status, which may restrict use in applications or regions with RoHS requirements.

RS010R5000FE73 (Similar Equivalent): This Vishay Dale part matches all critical electrical parameters and maintains axial package compatibility. Physical dimensions are slightly smaller, which may be advantageous in space-constrained layouts. The operating temperature range is narrower (-65°C ~ 250°C versus -55°C ~ 275°C), requiring verification that the application does not exceed 250°C. This part includes moisture-resistant features and carries ROHS3 compliance certification, making it suitable for regulated environments. Higher inventory availability (8415 units) supports supply chain continuity.

Frequently Asked Questions (FAQ)

Q: Can 40FR50 be used as a direct replacement for 40FR50E?

A: Yes, from an electrical and mechanical standpoint. Both parts have identical resistance (500 mOhms), tolerance (±1%), power rating (10W), temperature coefficient (±90ppm/°C), and physical dimensions. The primary difference is packaging format (bulk versus box) and RoHS compliance status. Verify that RoHS non-compliance does not conflict with application or regulatory requirements.

Q: Is RS010R5000FE73 compatible with 40FR50E in all applications?

A: RS010R5000FE73 is compatible for applications where the operating temperature does not exceed 250°C. The main part supports operation up to 275°C. Physical dimensions are slightly smaller (0.375" Dia x 1.780" L versus 0.406" Dia x 1.902" L), which may require layout verification in space-constrained designs. All electrical parameters match, including resistance, tolerance, power rating, and temperature coefficient.

Q: What are the key differences between the three parts?

A: 40FR50E and 40FR50 are electrically identical but differ in packaging (box versus bulk) and RoHS status. RS010R5000FE73 matches electrical specifications but has slightly smaller physical dimensions, a narrower operating temperature range, includes moisture-resistant features, and carries ROHS3 compliance. Inventory levels differ significantly, with RS010R5000FE73 offering substantially higher availability.

Q: Which substitute should be selected for RoHS-compliant applications?

A: RS010R5000FE73 carries ROHS3 compliance certification and is suitable for RoHS-regulated applications. The 40FR50 is RoHS non-compliant and should not be used in such contexts.

Q: Are there any mechanical considerations when substituting RS010R5000FE73?

A: Yes. RS010R5000FE73 has slightly smaller dimensions (0.375" Dia x 1.780" L) compared to the main part (0.406" Dia x 1.902" L). Verify that the smaller size is compatible with your PCB layout, mounting hardware, and thermal management design. The axial package type remains consistent across all three parts.